Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Sulfur or sulfur containing component
Patent
1974-03-13
1977-03-15
Vertiz, Oscar R.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Sulfur or sulfur containing component
423239, 423564, 423359, 431 4, 431 10, 423235, C01B 1700, C01B 1716, C01B 2100, F23J 700
Patent
active
040124886
ABSTRACT:
A catalyst chamber capable of converting the oxides of sulfur to hydrogen sulfide and the oxides of nitrogen to inert nitrogen and ammonia in the presence of a reducing atmosphere is inserted downstream of the boiler section of a fossil fuel burning power generator and there is added a system for extracting formed hydrogen sulfide from the fuel gas stream.
After combustion of the primary fuel, typically sulfur bearing coal in excess air, a gaseous hydrocarbon such as methane, is combined with the products of combustion to at least scavenge the oxygen present to form a boiler effluent which ranges from slightly oxidizing to reducing in nature.
Where the boiler effluent is reducing in nature, partial conversion of the oxides of sulfur and the oxides of nitrogen occur in the boiler, the balance occurring in the catalyst chamber.
Where the gas is slightly oxidizing or only slightly reducing, make up reducing gas is added to the flue gas, either from an external reducing gas generator, or by removing a portion of the flue gas from the boiler section for combination with a vaporized hydrocarbon and air in a secondary boiler to generate the reducing gas for the reactions to take place in the catalyst chamber.
The catalyst chamber is typically operated at a temperature from about 300.degree. to about 800.degree. F. In addition to eliminating air pollutants, boiler efficiency is increased.
REFERENCES:
patent: 1909378 (1933-05-01), Richardson
patent: 2910343 (1959-10-01), Childers et al.
patent: 3418258 (1968-12-01), Ackerman
patent: 3454355 (1969-07-01), Ryason
patent: 3752877 (1973-08-01), Beavon
patent: 3755550 (1973-08-01), Stiles
patent: 3794710 (1974-02-01), Morrill
patent: 3838193 (1974-09-01), Kajitani et al.
Heller Gregory A.
Ralph M. Parsons Company
Vertiz Oscar R.
LandOfFree
Process for the treatment of sulfur and nitrogen oxides formed d does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the treatment of sulfur and nitrogen oxides formed d, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the treatment of sulfur and nitrogen oxides formed d will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-426031